hello and welcome to just answer
can you tell me the brand and model of yourTV?
you must use a Mitsubishi remote according to the manufacturer
Appendix A: Bypassing the V-Chip Lock
Bypassing the V-Chip Lock
After you set the lock, you need your passcode to view a V-Chip locked program, view the locked TV, cancel the lock, or enter the V-Chip lock menus.
If you forget your passcode, you can view the locked TV without entering your passcode. When your password XXXXX XXXXX press the number 9 and QV buttons on the remote TV control at the same time. This process temporarily unlocks the TV.
When entering the V-Chip Lock menu, this process deletes your old passcode and prompts you to enter a new passcode.
Cut along the dotted line and file bypass instructions in a safe place for future reference.
When changing or deleting your passcode, you must use the remote control included with this TV. You cannot use a Mitsubishi remote control from another component or a "universal" remote.